Integrated thermal management system based on pure electric heavy truck platform and vehicle

Abstract

The utility model provides an integrated thermal management system based on a pure electric heavy truck platform and a vehicle. A BMS battery monitoring module controls the on-off of a compressor high-voltage pre-charging module according to the power-on state of the vehicle; the electric scroll compressor is respectively connected with the warm air core body and the plate heat exchanger; the output end of the first electronic expansion valve is connected with the first input end of the plate heat exchanger and the input end of the condenser. The output end of the condenser is connected with the input end of the electric scroll compressor; the second output end of the warm air core body is connected with the input end of the warm air water pump, and the output end of the warm air water pump is connected with the second input end of the warm air core body through the PTC heater; the second output end of the plate heat exchanger is connected with the input end of the battery water pump, the output end of the battery water pump is connected with the power battery cooling input end, and the power battery cooling output end is connected with the second input end of the plate heat exchanger. The system can meet the use requirements of battery cooling or vehicle air conditioners.

Description

Technical Field

[0001] The utility model belongs to the technical field of pure electric heavy trucks, and particularly relates to an integrated thermal management system and a vehicle based on a pure electric heavy truck platform. Background Art

[0002] With the rapid development of the new energy vehicle industry, as an important force for carbon emission reduction in commercial vehicles, the design and optimization of the thermal management system of pure electric heavy trucks are particularly important. During the operation of pure electric heavy trucks, they face working conditions such as high temperature and high-rate charging and discharging, which pose higher requirements for the thermal management of power batteries and passenger cabins.

[0003] Currently, the optimal working temperature range of power batteries is usually 20 - 30 °C. Beyond this range, it will affect the charging and discharging performance, cycle life, and safety of the batteries. For the thermal management of the passenger cabin, the thermal management of the passenger cabin of pure electric heavy trucks needs to meet the requirements of refrigeration and heating, especially under different cold and warm climate conditions. This requires the system to be able to quickly respond and adjust the temperature inside the passenger cabin to improve the comfort of driving and riding.

[0004] Therefore, how to design a thermal management system to ensure that the battery operates within a suitable temperature range and at the same time ensure that the temperature inside the passenger cabin meets the comfort requirements of driving and riding is an urgent problem to be solved at present. Content of the Utility Model

[0005] The utility model provides an integrated thermal management system based on a pure electric heavy truck platform, which can meet the demand for battery refrigeration and facilitate the real-time adjustment of the battery temperature.

[0006] The system includes: a BMS battery monitoring module, a thermal management controller, a compressor high-voltage pre-charge module, an electric scroll compressor, a plate heat exchanger, a gas-liquid separator, a condenser, a first electronic expansion valve, a battery water pump, a warm air water pump, an expansion tank, a PTC heater, and a warm air core;

[0007] The high-voltage power output terminal of the whole vehicle is connected to the power supply terminal of the electric scroll compressor through the compressor high-voltage pre-charge module;

[0008] The BMS battery monitoring module is connected to the compressor high-voltage pre-charge module and controls the on-off of the compressor high-voltage pre-charge module according to the power-on state of the vehicle;

[0009] The output end of the electric scroll compressor is respectively connected to the first input end of the warm air core and the first input end of the plate heat exchanger through the gas-liquid separator;

[0010] The first output end of the warm air core is connected to the input end of the first electronic expansion valve, and the output end of the first electronic expansion valve is respectively connected to the first input end of the plate heat exchanger and the input end of the condenser;

[0011] The output end of the condenser is connected to the input end of the electric scroll compressor;

[0012] The second output end of the heater core is connected to the input end of the heater water pump, and the output end of the heater water pump is connected to the second input end of the heater core through the PTC heater;

[0013] The second output end of the plate heat exchanger is connected to the input end of the battery water pump, the output end of the battery water pump is connected to the input end of the power battery cooling, and the output end of the power battery cooling is connected to the second input end of the plate heat exchanger;

[0014] The thermal management controller is respectively connected to the PTC heater, the electric scroll compressor and the first electronic expansion valve, and respectively controls the operation of the PTC heater, the electric scroll compressor and the first electronic expansion valve.

[0015] Furthermore, it should be noted that the compressor high-pressure pre-charge module includes: a high-pressure positive circuit, a high-pressure negative circuit, a pre-charge resistor, a capacitor C1, a capacitor C2 and a high-pressure relay;

[0016] The input ends of the high-pressure positive circuit and the high-pressure negative circuit are respectively connected to the output end of the vehicle high-voltage power supply; the output ends of the high-pressure positive circuit and the high-pressure negative circuit are respectively connected to the power supply end of the electric scroll compressor;

[0017] The pre-charge resistor is arranged on the high-pressure positive circuit, and the normally open end of the high-pressure relay is connected to both ends of the pre-charge resistor; the first ends of the capacitor C1 and the capacitor C2 are respectively connected to the high-pressure positive circuit;

[0018] The second ends of the capacitor C1 and the capacitor C2 are respectively connected to the high-pressure negative circuit.

[0019] A fuse is also arranged on the high-pressure positive circuit.

[0020] Furthermore, it should be noted that it also includes: a second electronic expansion valve;

[0021] The output end of the first electronic expansion valve is respectively connected to the input end of the second electronic expansion valve and the first input end of the condenser;

[0022] The output end of the second electronic expansion valve is connected to the first input end of the plate heat exchanger.

[0023] Furthermore, it should be noted that it also includes: a three-state pressure switch;

[0024] The three-state pressure switch is connected to the input end of the condenser.

[0025] Furthermore, it should be noted that it also includes: an air-conditioning panel; the air-conditioning panel is provided with a refrigeration / heating working mode selection button and a temperature adjustment button;

[0026] The air conditioner panel is connected to the BMS battery monitoring module. The BMS battery monitoring module selects the operating mode according to the refrigeration / heating operating mode selection button, and controls the operation of the electric scroll compressor and the PTC heater.

[0027] Furthermore, a high-pressure pressure sensor and an exhaust gas temperature sensor are provided on the pipeline near the input end of the electric scroll compressor.

[0028] A first low-pressure pressure sensor is provided on the pipeline at the output end of the gas-liquid separator.

[0029] Furthermore, an outlet water temperature sensor is provided on the pipeline at the second output end of the plate heat exchanger; a return water temperature sensor and a second low-pressure pressure sensor are provided on the pipeline at the second input end of the plate heat exchanger.

[0030] An expansion tank is connected to the pipeline at the input end of the battery water pump, and a liquid level sensor is provided on the expansion tank.

[0031] A condensing fan is installed on the condenser.

[0032] This application also provides a vehicle, including: an integrated thermal management system based on a pure electric heavy truck platform.

[0033] It can be seen from the above technical solutions that the present utility model has the following advantages:

[0034] The integrated thermal management system based on the pure electric heavy truck platform provided by the present utility model realizes the comprehensive thermal management of the battery and the cockpit, effectively improves the energy utilization efficiency. By precisely controlling the opening degrees of the electric scroll compressor, the PTC heater, the first electronic expansion valve and the second electronic expansion valve, the energy consumption of the whole vehicle is reduced, the thermal management effect is ensured, and the reliability of the whole vehicle is improved.

[0035] The BMS battery monitoring module of the present utility model monitors the battery state in real time and controls the on / off of the compressor high-voltage pre-charge module according to the power-on situation of the vehicle, which is beneficial to the integrated thermal management system to quickly respond to the battery refrigeration demand and facilitate the real-time adjustment of the battery temperature.

[0036] Through the coordinated operation of the heater core and the PTC heater, a comfortable temperature environment is provided for the cockpit, and a suitable driving temperature can be maintained. The combined action of the plate heat exchanger and the battery water pump effectively maintains the temperature of the power battery within a suitable range, avoiding the performance degradation caused by overheating or overcooling of the battery. It improves the energy utilization efficiency, enhances the system stability and reliability. Description of the Drawings

[0037] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0038] Figure 1 Schematic diagram of an integrated thermal management system based on a pure electric heavy truck platform;

[0039] Figure 2 Schematic diagram of an embodiment of an integrated thermal management system based on a pure electric heavy truck platform;

[0040] Figure 3 Schematic diagram of a compressor high - voltage pre - charge module. Detailed implementation manners

[0041] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this patent.

[0042] As Figure 1 and Figure 2 shown, the integrated thermal management system based on a pure electric heavy truck platform provided by the present utility model includes: BMS battery monitoring module, compressor high - voltage pre - charge module 14, thermal management controller 27, electric scroll compressor 1, plate heat exchanger 4, gas - liquid separator 2, condenser 3, three - state pressure switch 5, first electronic expansion valve 6, second electronic expansion valve 7, battery water pump 8, warm air water pump 9, expansion tank 10, PTC heater 11, and warm air core 12.

[0043] Specifically, the high - voltage power output terminal of the whole vehicle is connected to the power supply terminal of the electric scroll compressor 1 through the compressor high - voltage pre - charge module 14. The BMS battery monitoring module is connected to the compressor high - voltage pre - charge module 14 and controls the on - off of the compressor high - voltage pre - charge module 14 according to the power - on state of the vehicle.

[0044] The thermal management controller 27 is respectively connected to the PTC heater 11, electric scroll compressor 1, second electronic expansion valve 7, and first electronic expansion valve 6, and controls the operation of the PTC heater 11, electric scroll compressor 1, second electronic expansion valve 7, and first electronic expansion valve 6 respectively.

[0045] The output end of the electric scroll compressor 1 is respectively connected to the first input end of the heater core 12 and the first input end of the plate heat exchanger 4 through the gas-liquid separator 2; the first output end of the heater core 12 is connected to the input end of the first electronic expansion valve 6, and the output end of the first electronic expansion valve 6 is respectively connected to the first input end of the plate heat exchanger 4 and the input end of the condenser 3; a condensing fan is installed on the condenser 3. The output end of the condenser 3 is connected to the input end of the electric scroll compressor 1; the second output end of the heater core 12 is connected to the input end of the heater water pump 9, and the output end of the heater water pump 9 is connected to the second input end of the heater core 12 through the PTC heater 11; the second output end of the plate heat exchanger 4 is connected to the input end of the battery water pump 8, the output end of the battery water pump 8 is connected to the input end of the power battery cooling, and the cooling output end of the power battery 13 is connected to the second input end of the plate heat exchanger 4. The output end of the first electronic expansion valve 6 is respectively connected to the input end of the second electronic expansion valve 7 and the first input end of the condenser 3; the output end of the second electronic expansion valve 7 is connected to the first input end of the plate heat exchanger 4.

[0046] In this embodiment, the three-state pressure switch 5 is connected to the input end of the condenser 3. The high-pressure pressure sensor 15 is arranged in the pipeline of the electric scroll compressor 1 to detect the pressure of the compressor exhaust pipeline. Even if the high-pressure pressure sensor 15 fails, the three-state pressure switch 5 can disconnect the air-conditioning system, thus protecting the compressor.

[0047] In order to collect the high-pressure pressure information and relevant temperature information in the system, in this embodiment, a high-pressure pressure sensor 15 and an exhaust temperature sensor 16 are arranged on the pipeline near the input end of the electric scroll compressor 1. The high-pressure pressure sensor 15 and the exhaust temperature sensor 16 can collect the high-pressure pressure information and exhaust temperature information at the input end of the electric scroll compressor 1, and can send the temperature information to the thermal management controller 27, and then can be displayed and provide data support for the refrigeration and heating processes.

[0048] A first low-pressure pressure sensor 17 is arranged on the pipeline at the output end of the gas-liquid separator 2. An outlet water temperature sensor 18 is arranged on the pipeline at the second output end of the plate heat exchanger 4; a return water temperature sensor 19 and a second low-pressure pressure sensor 20 are arranged on the pipeline at the second input end of the plate heat exchanger 4; an expansion tank 10 is connected to the pipeline at the input end of the battery water pump 8, and a liquid level sensor 21 is arranged on the expansion tank 10.

[0049] The pressure information at the output end of the gas-liquid separator 2 detected by the first low-pressure pressure sensor 17, the water outlet temperature sensor 18 can detect the temperature information at the output end of the plate heat exchanger 4, and the return water temperature sensor 19 and the second low-pressure pressure sensor 20 can detect the pressure information and temperature information at the input end of the plate heat exchanger 4. The detected information can be transmitted to the thermal management controller 27, and then can be displayed and provide data support for the refrigeration and heating processes.

[0050] In this embodiment, the first electronic expansion valve 6 and the second electronic expansion valve 7 can be connected to the thermal management controller 27. The BMS battery monitoring module sends the battery cooling demand to the thermal management controller 27 in the form of a CAN message. The thermal management controller 27 adjusts the first electronic expansion valve 6 and the second electronic expansion valve 7, distributes the cooling capacity to the battery side according to the actual working conditions, and then uses the plate heat exchanger 4 to realize the heat exchange between the refrigerant and the water circuit, so as to complete the temperature adjustment of the battery.

[0051] In this embodiment, the thermal management controller 27 controls the electric scroll compressor 1 and the PTC heater 11 in a one-to-two manner to meet the functions of cabin refrigeration / heating and battery cooling. According to the different refrigeration demands on the cabin side and the battery side, the thermal management controller 27 adjusts the opening degrees of the first electronic expansion valve 6 and the second electronic expansion valve 7 in real time, dynamically distributes the cooling capacity of the two systems, and while ensuring the comfort of the driver, also meets the refrigeration demand of the battery.

[0052] The system of this embodiment further includes: an air-conditioning panel; the air-conditioning panel is provided with a refrigeration / heating working mode selection button and a temperature adjustment button; the air-conditioning panel is connected to the BMS battery monitoring module, and the BMS battery monitoring module controls the operation of the electric scroll compressor 1 and the PTC heater 11 according to the working mode selected by the refrigeration / heating working mode selection button.

[0053] Specifically, the user can operate the buttons on the air-conditioning panel to select the working mode and send it to the thermal management controller 27 in the form of a CAN message. The thermal management controller 27 controls the operation of the electric scroll compressor 1 or the PTC heater 11 according to the working mode. Through the thermal management controller 27, both the start and stop of the electric scroll compressor 1 and the start and stop of the PTC heater 11 can be controlled to meet the refrigeration and heating demands of the cabin.

[0054] As an embodiment of the present application, according to actual needs, the air-conditioning panel receives the outdoor temperature, indoor temperature, evaporator surface temperature collected by each sensor, as well as the temperature and air volume parameter information of the air outlet set by the user. These data are sent to the thermal management controller 27 through the vehicle CAN bus. The thermal management controller 27 obtains the current cooling capacity requirement of the cockpit, and then adjusts the opening degree of the first electronic expansion valve 6 according to the exhaust temperature, exhaust pressure of the scroll compressor 1 and the superheat degree at the outlet side of the condenser 3, adjusts the rotation speed of the scroll compressor 1 by using an adaptive PID algorithm, and adjusts the rotation speed of the condenser fan according to the exhaust temperature and pressure of the scroll compressor 1, so as to maintain the inlet and outlet temperatures of the condenser 3 within a reasonable temperature range and ensure that the condenser 3 has sufficient heat dissipation.

[0055] During the battery temperature control process, the battery is cooled by water cooling, that is, the heat inside the battery is taken away by the way of coolant circulation. Then the coolant enters the plate heat exchanger 4 and exchanges heat with the refrigerant therein, thereby reducing the water temperature of the coolant. It can be seen that the battery water cooling is an indirect cooling method.

[0056] The scroll compressor 1 discharges high-temperature and high-pressure gaseous refrigerant. The refrigerant first undergoes the condensation effect of the condenser 3 and is converted into high-temperature and high-pressure liquid refrigerant. Then the air-conditioning pipeline is divided into two paths. One path enters the evaporation core of the cockpit, and the other path enters the plate heat exchanger 4. Before entering the evaporation core and the plate heat exchanger 4, the refrigerant will pass through the first electronic expansion valve 6 and the second electronic expansion valve 7. Through the throttling effect of the electronic expansion valve, the high-temperature and high-pressure liquid refrigerant is converted into low-temperature and low-pressure gaseous refrigerant. The gaseous refrigerant absorbs the surrounding heat through the physical phenomenon of evaporation heat absorption. Finally, the refrigerant on the cockpit and battery sides is combined into one. After passing through the gas-liquid separator 2, it returns to the cavity of the scroll compressor 1. The gas-liquid separator 2 can ensure that the refrigerant entering the compressor is completely gaseous and prevent liquid refrigerant from entering the scroll compressor 1 and causing damage to it.

[0057] When the cockpit air conditioner is turned on alone in this embodiment, the thermal management controller 27 will adjust the opening degree of the first electronic expansion valve 6 according to the exhaust temperature, exhaust pressure of the scroll compressor 1 and the superheat degree at the evaporator outlet, and the second electronic expansion valve 7 will be in the closed state. The thermal management controller 27 will comprehensively calculate the real-time rotation speed of the compressor according to the evaporation temperature, set temperature, air volume of the air outlet, ambient temperature and return air temperature feedback by the air-conditioning panel.

[0058] When the battery air conditioner is turned on alone in this embodiment, the control strategy of the thermal management controller 27 is similar to that when the cockpit air conditioner is turned on alone. According to the temperature difference between the inlet and outlet water temperatures of the battery water circuit, the real-time rotation speed of this embodiment is calculated. At this time, the first electronic expansion valve 6 is closed and the second electronic expansion valve 7 is adjusted.

[0059] In this embodiment, when the cabin air conditioner and the battery air conditioner are both turned on, the thermal management controller 27 will adjust the opening of the first electronic expansion valve 6 and the second electronic expansion valve 7 according to the cooling demand on both sides. When the cabin is heated, the thermal management controller 27 will adjust the power of the PTC heater 11 according to the set temperature, the indoor temperature and the outdoor temperature, so as to achieve rapid heating of the cabin.

[0060] In this embodiment, Figure 3 As shown, the compressor high-pressure pre-charging module 14 includes: a high-pressure positive circuit 25, a high-pressure negative circuit 26, a pre-charging resistor 22, a capacitor C1, a capacitor C2 and a high-pressure relay 23; the input end of the high-pressure positive circuit 25 and the input end of the high-pressure negative circuit 26 are respectively connected to the high-pressure power output end of the vehicle; the output end of the high-pressure positive circuit 25 and the output end of the high-pressure negative circuit 26 are respectively connected to the power supply end of the electric scroll compressor 1; the pre-charging resistor 22 is arranged on the high-pressure positive circuit 25, and the normally open end of the high-pressure relay 23 is connected to the two ends of the pre-charging resistor 22; the first end of the capacitor C1 and the first end of the capacitor C2 are respectively connected to the high-pressure positive circuit 25; the second end of the capacitor C1 and the second end of the capacitor C2 are respectively connected to the high-pressure negative circuit 26. A fuse 24 is also arranged on the high-pressure positive circuit 25.

[0061] Specifically, after the whole vehicle is on high voltage, the BMS battery monitoring module will send a request to the whole vehicle all-in-one to close the relay that controls the high voltage of the electric scroll compressor 1, and then the high voltage will be transmitted to the compressor high voltage pre-charging module 14 through the relay. The current first passes through the pre-charging resistor 22 circuit inside the compressor high voltage pre-charging module 14. After the compressor terminal voltage reaches 450V, the high voltage relay 23 inside the compressor high voltage pre-charging module 14 is closed, thereby short-circuiting the pre-charging resistor 22 branch. This means that the compressor pre-charging is completed and the high voltage action is completed. It can be seen that the high voltage of the compressor is completed immediately after the whole vehicle is on high voltage, rather than starting the high voltage action when there is a cooling demand. This is conducive to the integrated thermal management system to quickly respond to the battery cooling needs and facilitate real-time adjustment of the battery temperature.

[0062] Compared with the high-voltage process of the electric compressor, the high-voltage process of the PTC heater 11 is that the air-conditioning panel sends a heating request to the thermal management controller 27, the thermal management controller 27 interacts with the vehicle controller, and requests the all-in-one high-voltage relay 23 to close the PTC branch. After the relay is energized, the PTC heater 11 completes the high-voltage action, and then waits for the thermal management controller 27 to send a power request. Finally, the PTC heater 11 responds and operates.

[0063] It should be understood that when an element or layer is referred to as being "on", "connected" or "coupled" to another element or layer, it may be directly on the other element or layer, directly connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on", "directly connected" or "directly coupled" to another element or layer, there are no intervening elements or layers. Like numerals refer to like elements throughout the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0064] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description herein. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that when used in this specification, the term "comprises" refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0065] The thermal management controller may include one or more processors for execution, such as one or more digital signal processors (DSPs), general microprocessors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other integrated circuits, or discrete logic circuitry. Thus, the term "processor" as used herein can refer to any of the foregoing structures or any other structure suitable for implementing the techniques described herein. Additionally, in some aspects, the functions described in this disclosure may be provided in software modules and hardware modules.

[0066] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model and in the above drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the data so used may be interchanged where appropriate so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprises" and "has" and any variations thereof are intended to cover non-exclusive inclusion.

[0067] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present utility model. Thus, the present utility model will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated thermal management system based on a pure electric heavy truck platform, characterized in that: include: BMS battery monitoring module, thermal management controller, compressor high-pressure pre-charge module, electric scroll compressor, plate heat exchanger, gas-liquid separator, condenser, first electronic expansion valve, battery water pump, heater water pump, expansion water tank, PTC heater and heater core; The high-voltage power output end of the vehicle is connected to the power supply end of the electric scroll compressor through the compressor high-voltage pre-charge module; The BMS battery monitoring module is connected to the compressor high-voltage pre-charging module, and controls the on and off of the compressor high-voltage pre-charging module according to the power-on status of the vehicle; The output end of the electric scroll compressor is connected to the first input end of the warm air core and the first input end of the plate heat exchanger respectively through the gas-liquid separator; The first output end of the heater core is connected to the input end of the first electronic expansion valve, and the output end of the first electronic expansion valve is respectively connected to the first input end of the plate heat exchanger and the input end of the condenser; The output end of the condenser is connected to the input end of the electric scroll compressor; The second output end of the heater core is connected to the input end of the heater water pump, and the output end of the heater water pump is connected to the second input end of the heater core through the PTC heater; The second output end of the plate heat exchanger is connected to the input end of the battery water pump, the output end of the battery water pump is connected to the power battery cooling input end, and the power battery cooling output end is connected to the second input end of the plate heat exchanger; The thermal management controller is connected to the PTC heater, the electric scroll compressor and the first electronic expansion valve respectively, and controls the operation of the PTC heater, the electric scroll compressor and the first electronic expansion valve respectively.

2. The integrated thermal management system based on the pure electric heavy truck platform according to claim 1 is characterized in that: The compressor high-voltage pre-charging module includes: a high-voltage positive circuit, a high-voltage negative circuit, a pre-charging resistor, a capacitor C1, a capacitor C2 and a high-voltage relay; The input end of the high-voltage positive circuit and the input end of the high-voltage negative circuit are respectively connected to the high-voltage power output end of the vehicle; the output end of the high-voltage positive circuit and the output end of the high-voltage negative circuit are respectively connected to the power supply end of the electric scroll compressor; The pre-charging resistor is arranged on the high-voltage positive circuit, and the normally open end of the high-voltage relay is connected to both ends of the pre-charging resistor; the first end of the capacitor C1 and the first end of the capacitor C2 are respectively connected to the high-voltage positive circuit; The second end of the capacitor C1 and the second end of the capacitor C2 are connected to the high-voltage negative loop respectively.

3. The integrated thermal management system based on the pure electric heavy truck platform according to claim 2 is characterized in that: A fuse is also provided on the high voltage positive circuit.

4. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: Also includes: The second electronic expansion valve; The output end of the first electronic expansion valve is connected to the input end of the second electronic expansion valve and the first input end of the condenser respectively; The output end of the second electronic expansion valve is connected to the first input end of the plate heat exchanger.

5. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: Also includes: Three-state pressure switch; A three-state pressure switch is connected to the condenser input.

6. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: Also includes: Air conditioning panel: The air conditioning panel is provided with a cooling / heating working mode selection button and a temperature adjustment button; The air conditioning panel is connected to the BMS battery monitoring module, which controls the operation of the electric scroll compressor and the PTC heater according to the working mode selected by the cooling / heating working mode selection button.

7. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: A high-pressure pressure sensor and an exhaust gas temperature sensor are provided on the pipeline close to the input end of the electric scroll compressor; A first low-pressure sensor is arranged on the pipeline at the output end of the gas-liquid separator.

8. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: An outlet water temperature sensor is provided on the pipeline at the second output end of the plate heat exchanger; a return water temperature sensor and a second low-pressure pressure sensor are provided on the pipeline at the second input end of the plate heat exchanger; An expansion water tank is connected to the pipeline at the input end of the battery water pump, and a liquid level sensor is arranged on the expansion water tank.

9. The integrated thermal management system based on a pure electric heavy truck platform according to claim 1 or 2, characterized in that: A condensing fan is installed on the condenser.

10. A vehicle, characterized in that: include: An integrated thermal management system based on a pure electric heavy truck platform as described in any one of claims 1 to 9.

Images